Greta Thunberg nails the #2019in5words challenge

12:48pm PST - December 28th, 2019    greta thunberg - Mashable

It might seem difficult to sum up an entire year using only five words, but Greta Thunberg completed the task with ease. Inspired by #2019in5words, the latest end of year hashtag to trend on Twitter, the 16-year-old climate activist tweeted one of her most po…